redhog wrote:
Is sorting in PostgreSQL stable over subqueries, that is, is
select * from (select * from A order by x) as B order by y;
equivalent with
select * from A order by y, x;
I don't see how it could be:
SELECT * FROM (SELECT * FROM a ORDER BY x DESC) AS B ORDER BY x ASC;
--
Richard Huxton
Archonet Ltd
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